Method and Device in First Node for Wireless Communication

1. A method in a first node for wireless communication, comprising: monitoring a first signaling and a second signaling in a first time-frequency resource set; and judging whether to transmit a first radio signal according to a monitoring result of the first signaling; and transmitting the first radio signal in a second time-frequency resource set, when judging to transmit the first radio signal; wherein the second signaling is not correctly decoded in the first time-frequency resource set, a signaling format corresponding to the second signaling is used for scheduling of a data signal; and the first radio signal is used for indicating that a data signal scheduled by the second signaling is not correctly decoded; the first signaling includes a first Physical Sidelink Control Channel (PSCCH); the second signaling includes a second PSCCH; a physical layer channel occupied by the first radio signal includes a Physical Sidelink Feedback Channel (PSFCH); the first signaling is correctly decoded; the first signaling indicates Q1 node(s) from Q nodes, and the first node is one of the Q nodes; if the first node is one of the Q1 node(s), it is judged to transmit the first radio signal; otherwise, it is judged not to transmit the first radio signal; the Q is a positive integer greater than 1; and the Q1 is a positive integer not greater than the Q; any one of the Q nodes is one terminal, or any one of the Q nodes is one UE, or any one of the Q nodes is one vehicle; the Q nodes correspond to Q different identifiers respectively; the first signaling comprises Q bits, and the Q bits correspond to the Q different identifiers respectively; the Q nodes all belong to one given terminal group, the given terminal group corresponds to a given terminal group identifier, and a CRC sequence comprised in the first signaling is scrambled with the given terminal group identifier; Q is a positive integer greater than 1.

2. A first node for wireless communication, comprising: a first receiver, to monitor a first signaling and a second signaling in a first time-frequency resource set; and a first transmitter, to judge whether to transmit a first radio signal according to a monitoring result of the first signaling; and to transmit the first radio signal in a second time-frequency resource set, when judging to transmit the first radio signal; wherein the second signaling is not correctly decoded in the first time-frequency resource set, a signaling format corresponding to the second signaling is used for scheduling of a data signal; and the first radio signal is used for indicating that a data signal scheduled by the second signaling is not correctly decoded; the first signaling includes a first Physical Sidelink Control Channel (PSCCH); the second signaling includes a second PSCCH; a physical layer channel occupied by the first radio signal includes a Physical Sidelink Feedback Channel (PSFCH); the first signaling is correctly decoded; the first signaling indicates Q1 node(s) from Q nodes, and the first node is one of the Q nodes; if the first node is one of the Q1 node(s), it is judged to transmit the first radio signal; otherwise, it is judged not to transmit the first radio signal; the Q is a positive integer greater than 1; and the Q1 is a positive integer not greater than the Q; any one of the Q nodes is one terminal, or any one of the Q nodes is one UE, or any one of the Q nodes is one vehicle; the Q nodes correspond to Q different identifiers respectively; the first signaling comprises Q bits, and the Q bits correspond to the Q different identifiers respectively; the Q nodes all belong to one given terminal group, the given terminal group corresponds to a given terminal group identifier, and a CRC sequence comprised in the first signaling is scrambled with the given terminal group identifier.

3. The first node according to claim 2, wherein if the first signaling is not correctly received, it is judged to transmit the first radio signal; otherwise, it is judged not to transmit the first radio signal.

4. The first node according to claim 2, wherein the first signaling is used for determining that the second signaling is transmitted by a transmitter of the first signaling in the first time-frequency resource set.

5. The first node according to claim 2, wherein a first time window comprises M1 multicarrier symbols, and the first time window is located behind time domain resources occupied by the first time-frequency resource set; the first signaling is used for determining a type of any one multicarrier symbol among the M1 multicarrier symbols; and the M1 is a positive integer greater than 1.

6. The first node according to claim 2, wherein a second time window is located behind time domain resources occupied by the first time-frequency resource set; and the first signaling is used for determining whether the first node needs to perform a blind detection of a physical layer control signaling in the second time window.

7. The first node according to claim 2, wherein the first receiver further receives first information; the first information is used for determining K1 first-type time-frequency resource sets, and the first time-frequency resource set is one of the K1 first-type time-frequency resource sets; and the K1 first-type time-frequency resource sets are reserved for transmission of a physical layer control signaling; K1 is an integer greater than 1.

8. The first node according to claim 2, wherein the first time-frequency resource set comprises a first time-frequency resource subset and a second time-frequency resource subset, the first signaling is transmitted in the first time-frequency resource subset, and the second signaling is transmitted in the second time-frequency resource subset; and time domain resources occupied by the first time-frequency resource subset are located before time domain resources occupied by the second time-frequency resource subset.

9. The first node according to claim 2, wherein the second time-frequency resource set is associated to the first signaling, or the first signaling is used for determining the second time-frequency resource set.

10. A second node for wireless communication, comprising: a second transmitter, to transmit at least a first signaling of the first signaling and a second signaling in a first time-frequency resource set; and a second receiver, to receive a first radio signal in a second time-frequency resource set; wherein the second signaling is not correctly decoded in the first time-frequency resource set, a signaling format corresponding to the second signaling is used for scheduling of a data signal; and the first radio signal is used for indicating that a data signal scheduled by the second signaling is not correctly decoded by a transmitter of the first radio signal; the first signaling includes a first Physical Sidelink Control Channel (PSCCH); the second signaling includes a second PSCCH; a physical layer channel occupied by the first radio signal includes a Physical Sidelink Feedback Channel (PSFCH); the first signaling is correctly decoded; the first signaling indicates Q1 node(s) from Q nodes, and the first node is one of the Q nodes; if the first node is one of the Q1 node(s), it is judged to transmit the first radio signal; otherwise, it is judged not to transmit the first radio signal; the Q is a positive integer greater than 1; and the Q1 is a positive integer not greater than the Q; any one of the Q nodes is one terminal, or any one of the Q nodes is one UE, or any one of the Q nodes is one vehicle; the Q nodes correspond to Q different identifiers respectively; the first signaling comprises Q bits, and the Q bits correspond to the Q different identifiers respectively; the Q nodes all belong to one given terminal group, the given terminal group corresponds to a given terminal group identifier, and a CRC sequence comprised in the first signaling is scrambled with the given terminal group identifier.

11. The second node according to claim 10, wherein the first signaling is used for determining that the second signaling is transmitted by the second node in the first time-frequency resource set.

12. The second node according to claim 10, wherein a first time window comprises M1 multicarrier symbols, and the first time window is located behind time domain resources occupied by the first time-frequency resource set; the first signaling is used for determining a type of any one multicarrier symbol among the M1 multicarrier symbols; and the M1 is a positive integer greater than 1.

13. The second node according to claim 10, wherein a second time window is located behind time domain resources occupied by the first time-frequency resource set; and the first signaling is used for determining whether the first node needs to perform a blind detection of a physical layer control signaling in the second time window.

14. The second node according to claim 10, wherein the first receiver further receives first information; the first information is used for determining K1 first-type time-frequency resource sets, and the first time-frequency resource set is one of the K1 first-type time-frequency resource sets; and the K1 first-type time-frequency resource sets are reserved for transmission of a physical layer control signaling; K1 is an integer greater than 1.

15. The second node according to claim 10, wherein the first time-frequency resource set comprises a first time-frequency resource subset and a second time-frequency resource subset, the first signaling is transmitted in the first time-frequency resource subset, and the second signaling is transmitted in the second time-frequency resource subset; and time domain resources occupied by the first time-frequency resource subset are located before time domain resources occupied by the second time-frequency resource subset.

16. The second node according to claim 10, wherein the monitoring result of the first signaling comprises whether the transmitter of the first radio signal correctly decodes the first signaling, or the monitoring result of the first signaling comprises an indication content in the first signaling.